Portable battery



FIG. 1 is a perspective view from front and right side of a portable battery.

FIG. 2 is a perspective view from front and left side thereof.

FIG. 3 is a perspective view from rear and right side thereof

FIG. 4 is a perspective view from rear and left side thereof.

FIG. 5 is a front elevation view thereof.

FIG. 6 is a rear elevation view thereof.

FIG. 7 is a left side elevation view thereof.

FIG. 8 is a right side elevation view thereof.

FIG. 9 is a top plan view thereof; and,

FIG. 10 is a bottom plan view thereof.

The broken lines shown in the drawings illustrate portions of the potable battery that form no part of claimed design. 

CLAIM The ornamental design for a portable battery, as shown and described. 